alfkoehn / co2_monitor Goto Github PK

fritzing part is mirrored and holes are two small for 1/32 mill.

When i used your .ino, my esp board connected to my WLAN correctly but showed up as Access point "ESP-nnnnnn" as well.
(to be more specific: i was able to connect to that WLAN without password, port scan shows port 80 open then, but my browser only shows a blank page).

So i started reading some docs.
Station Class documentation says
"Switching the module to Station mode is done with begin function"

This corrosponds with your code WiFi.begin()
but later the doc says
...
"... It is possible that calling begin will result in the module being in STA + softAP mode if the module was previously placed into AP mode."

I assume this is the effect i ran into (board was brand-new, never used it before).
reading this i added an additional line

WiFi.mode(WIFI_STA)

After compiling and installing this i do not see the ESP-nnnnnn Access point anymore.

As i am not very familiar with coding nor am i sure if this is a general issue or just an "Einzelfall" and my "solution" ist correct, please have a look at it and let me know.
(I did not try out if the AP reappears if i remove the WiFi.mode(WIFI_STA) line later, just left it in my .ino file)

PS: I like your CO2 project very much - was a starting point to get into coding and IOT as well and look forward to your chart.js snippets

Aim: show the Degree sign in "°C"
Code:
In the .ino you reference to Codepage 437, character 167 (which is "Masculine ordinal indicator")
I found detail here: codepage437 and changed the section in .ino to

...
display.setCursor(x0+7*6,15);
display.write(248);
...

PS: additionally I prefixed display.write(248); with
display.cp437(true); // Use full 256 char 'Code Page 437' font
(worked either with or whitout it but feels better)
;-)